12 We wished briefly to rehearse the salient points in the grievous condition of the Church in Mexico, so that all lovers of order and peace among nations, on seeing that such an unheard of persecution differs but little, especially in certain States, from the one raging within the unhappy borders of Russia, may from this iniquitous similarity of purpose conceive fresh ardour to stem the torrent which is subverting all social order. At the same time it is Our intention to give a new proof to you, Venerable Brethren, and to all Our beloved sons of Mexico, of the paternal solicitude with which We follow you in your tribulation: the same solicitude that inspired the instructions which We gave you last January through Our Beloved Son the Cardinal Secretary of State, and which was communicated to you by Our Apostolic Delegate. In matters strictly connected with religion, it is undoubtedly Our duty and Our right to establish the reasons and norms that all who glory in the name of Catholics are under the obligation of obeying. In this connection We are anxious to recall to mind that when We issued these instructions We gave due consideration to all the reports and advices that came to Us either from the Hierarchy or the faithful. We say all, even those that appeared to counsel a return to a severer line of conduct, with the total suspension of public worship throughout the Republic, as in 1926.
Source: Acerba Animi (Vatican.va)